A 60-Kg Skier Starts from Rest from the Top of a 50-M

Multiple Choice

A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction is -6.0 kJ, what is the speed of the skier on reaching the bottom of the slope?

A) 31 m/s
B) 28 m/s
C) 17 m/s
D) 24 m/s